Rigidizer, Cement, & Glue


What is a Rigidizer?

A rigidizer is manufactured and used to increase the surface hardness of ceramic fiber products, such as boards and blankets. This coating compound forms a protective ridgid surface and improves resistance to erosion. Our office two variations depending on your application need and operating temperature.

Colloidal Silica Rigidizer – is a clear low viscosity liquid with a 40% suspension of fine amorphous, nonporous, and spherical silica particles in a caustic aqueous liquid phase stabilized with Na. This rigidizer is used to increase the surface hardness of ceramic fiber products up to 2600℉ (1427℃).

Colloidal Alumina Rigidizer – is a clear low viscosity liquid with a 15% suspension of fine spherical alumina particles in an acidic aqueous liquid phase stabilized by chloride. This rigidizer is used to increase the surface hardness of ceramic fiber products up to 3000℉ (1650℃).

Please note both products have a shelf life of six months if sealed and covered. Do not allow product to freeze.

Benefits

  • Increases surface hardness of ceramic products.
  • Easily applied by brushing, rolling, dipping, or spraying.
  • Reflects heat and thermal shock resistant.
  • Bond composites and laminates.
  • Increases resistance to erosion of high velocity gases.

Applications

  • Surface coating for ceramic products exposed to high velocity gases or flame impingement.
  • Adhesive for use in making composites and laminates.
  • Adhesive for ceramic blanket and paper.
  • Catalytic converter mat protection.
  • Surface treatment for vacuum formed shapes to increase surface hardness.
  • Veneering Modules over Refractory.
  • Attaching Boards to Furnace Shell.

Useful Charts

Colloidal Silica Rigidizer
ColorClear
ConsistencySlightly Viscous liquid
Consistency1.3
Particle Size (nm)Average
Silica (wt%)40
Na2O (wt%)0.50
pH @ 25℃10.4
Viscosity @ 25℃ (cp)15
ToxicityNon-toxic
Packaging1 gal.
5 gal.
55 gal.
Colloidal Alumina Rigidizer
ColorWhite
ConsistencyLiquid
Concentration (wt%)30
pH (20% sol)3.5 - 4.5
Average Particle Size (nm)100
Specific Gravity1.23
Stabilizing IonNitrate 0.33%

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If you have any additional questions or need a custom quote our team is always available to help.


What is RCF Coating Cement?

RCF Coating Cement is a fiberboard coating and cement that is manufactured from colloidal silica and mixed with a ceramic fiber power and thickening agent. The coating cement has a temperature rating of 2300℉ (1260℃) and is equatable to QF-180 from Unifrax. The consistency of the cement makes it very versatile and permits differing applications.

Benefits

  • Resists wetting by many nonferrous molten metals.
  • Erosion resistance and good adhesion to most materials.
  • Dielectric strength and thermal reflectance
  • Easy and versatile application via brushing, dipping, or spraying.

Applications

  • Surface coating for molten aluminum contact.
  • Oxidation-resistant coatings for injection tubes and graphite crucibles.
  • Flame resistant coatings.
  • Patching refractory Joints & Cracks.
  • Hardware protection for ceramic fiber furnace linings.
  • Patching for burner blocks and vacuum formed Ceramic Fiber parts.
  • Radiant coating for a variety of substrates.
  • Electrical insulation coatings and potting.

Useful Charts

RCF Coating Cement Properties
PropertiesUnitsValues
ColorWhite
Temperature Grade2300
Recommended Operating Temperature2150
Percent Solids%50-60
Wet densitylbs/ft³80-90
Dry densitylbs/ft³45-55
Normal layer thicknessInches0.010"
Approx. coverageSF/Gal50-100
Mean Coefficient of Expansionin/in ℉3.0 x 10-6
LOI%4-5
Typical Shrinkage%
24hrs
< 5
@2000
Approx Dielectric StrengthVolts/Mil39
MOR
Dry (typical)
PSI400
Molten Aluminum Wetting ResistanceGood

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If you have any additional questions, or need a custom quote our team is always available to help.

Downloadables

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What is Refractory Cement?

Refractory cement is an excellent solution for bonding brickwork into a solid unit and is rated to a temperature of 3000℉. The cement, or mortar permits greater resistance to mechanical stresses, and thermal shocks while providing a cushion between irregular brick surfaces for a firm bearing on each course. 

Our office stocks Wet Air-Setting due to its ease of application and rigid set upon air drying. The cement is specially formulated to have high water retention and was designed for the layering of fire, super duty, and high alumina bricks  If you are interested in a different refractory cement or need greater bond strength or dry bags, please contact us for a custom quote.

Benefits

  • Smooth consistency develops a strong brick-to-brick bond
  • Excellent work capability and ease of application. 
  • Resistance to the infiltration of air and hot gases
  • Resistant to all types of molten metal applications and destructive chemical attacks.
  • Retards penetration of slag and molten metal into the joints.

Applications

  • Laying and building brick installations for various applications which are subjected to intense heat.

Useful Charts

Refractory Cement Wet-Air Setting Properties
PropertiesValues
Temperature Limit3000 ℉
≅ lbs to set 1000
9" x 4.5" x 2.5" Bricks
200-400
Modulus of Rupture
Mortar
 
4200
Modulus of Rupture
Dipped Jopint, ASTM C 198
 
375
Linear Shrinkage4.3 % @ 212℉
Refractoriness
ASTM C 199
No Flow
@3000 ℉
Density126 pcf
Dipping Density
Percent H2O
124 pcf
4
Chemical Composition (% Wt)
SiO2
Al2O3
Fe2O3
TiO2
CaO
MgO
K2O
Na2O
Misc
lg Loss
 
48.8
43.2
1.2
1.5
0.3
-
0.8
2.4
-
1.8

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If you have any additional questions, or need a custom quote our team is always available to help.

Downloadables

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What is Ceramic Fiberboard Glue?

Fiberboard glue is a colloidal silica based glue best used for joining two pieces of ceramic fiber board together or patching small areas. The glue is manufactured by dispersing ceramic fibers in a liquid based refractory binder system. The resulting viscous consistency allows the glue to be easily applied to refractory ceramic fiber surfaces by troweling or hand forming. Drying can be performed at a range of temperatures from ambient to extreme. Once fully dried, the glue can be sanded or cut using traditional finishing methods due to the product’s excellent tensile strength. Additional coats be be applied after full drying of base.

Available in grades rated for 2300℉, 2600℉, and 3000℉.

Benefits

  • Ease and versatility of application.
  • Excellent adhesion and finishing properties.
  • Ability for multiple coats and greater thickness if required.

Applications

  • Joining ceramic fiber products, such as boards.
  • Adhesive and coating for Vacuum Formed Ceramic Fiber Shapes.
  • Repair cracks or damage areas for burner blocks or ceramic fiber shapes.
  • Flame resistant coating.

Useful Charts

Ceramic Fiberboard Glue Properties
Properties2300℉2600℉
Color before Firing
Color after Firing
Off-white
Cream white
Off-white
Cream white
Maximum Temperature1260℃ | 2300℉1427℃ | 2600℉
Continuous Use Temperature.1093℃ | 2000℉1260℃ | 2300℉
Normal layer Thickness (in)1/16" | 1/8"1/16" | 1/8"
LOI (wt%)4-104-10
Typical Shrinkage (%)
24hrs @ 2000℉
 
-
 
-
Packaging1 qt.
1 gal.
5 gal.
1 qt.
1 gal.
5 gal.

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If you have any additional questions, or need a custom quote our team is always available to help.

Downloadables

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What is a Ceramic Fiberboard Moldable Mix?

A ceramic moldable mix consist of fibers dispersed in a slightly sticky refractory binder system to permit vibratory casting rated to 2300F. The putty-like consistency allows easy application by caulking, troweling, hand-forming, and pressure molding. Mix readily dries over a range of temperatures from ambient to high temperatures. Once drained in place, the moldable hardens with high tensile strength and resistance to molten metals.

Benefits

  • Ability to create custom shapes and sizes for unique applications.
  • Ease of use and varying application methods.
  • Dries over a range of temperatures.
  • Mix hardens with high tensile strength and resistance to molten metals.

Applications

  • Patching refractory joints and cracks
  • Hardware protection of ceramic fiber furnace linings.
  • Patching for burner blocks & vacuum formed ceramic fiber parts.

Useful Charts

Ceramic Fiberboard Moldable Mix Properties
PropertiesValues
ColorWhite
Max Temperature2300℉
Percent Solids50-60 %
Wet Density80-90 lbs/ft³
Dry Density45-55 lbs/ft³
LOI4-5 %
Shrinkage @ 2000℉< 5 %
MOR (dry)400 psi
ConsistencyPutty

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If you have any additional questions, or need a custom quote our team is always available to help.

Downloadables

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